Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc2765e97c4b214…

MALICIOUS

PDF

79.1 KB Created: 2021-03-23 02:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a55ad75cbca2fedffaef56f96a9abbb6 SHA-1: b9ef098744928aff1376cfa2acd8af3089f5f89b SHA-256: 9fc2765e97c4b21497ca7fa7aa8d9367ce23f806f88a6da06a6fa0e5c51b82e1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/wix?keyword=the+tiny+seed+worksheets PDF link annotation
    • http://pakunobun.getenjoyment.net/bell_f12_bike_computer_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/usRbrjh/87233494018.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/libro_de_canciones_para_guitarra_electrica.pdfIn PDF document text
    • http://goldalbum.ru/how_to_use_echo_show_to_video_call1twbs.pdfIn PDF document text
    • http://cmb-accueil.com/75566451720zza6d.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/cheijgh/fire_lion_images_hd_download.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/sitaraga.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/iyahcjd/pezoratubosofi.pdfIn PDF document text
    • http://pss77.ru/what_does_a_shift_supervisor_at_starbucks_makei8ph8.pdfIn PDF document text
    • https://cdn.sqhk.co/kafodarifab/hgift7M/swahili_worship_songs_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/chfAdn1/egyptian_museum_adventure_3d_mod_apk.pdfIn PDF document text
    • http://vinograd.io/9562208990v2qg8.pdfIn PDF document text
    • http://centerbluebadge.com/declaration_cession_vehicule_cerfayq5qu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_7961e78de82a460194d108be967befb5.pdf?index=trueIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_19dd42110a8b48ce96fb0bb57bb82963.pdf?index=trueIn PDF document text
    • http://zujisofivo.onlinewebshop.net/pepenu.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/causes_of_poverty_in_south_africa.pdfIn PDF document text
    • http://zelimuperuna.rf.gd/livros_de_psicologia_comportamental_para_iniciantes.pdfIn PDF document text
    • http://ladipuxot.rf.gd/vaxojovalemaze.pdfIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_571417577fcc463b855298674b8d6faf.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 4664 bytes
SHA-256: aac974cd909d0eed5b8cc7f126fb4f26ff303a8cb83e160fbd86881182d8fbd8
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 10536 bytes
SHA-256: 06416fea121506cda511b113d97f7f6e277e30eff3097f7bd0258974b532757f
font_02_sfnt_off00012136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12136 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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